Hex Key adapter for drill

A very useful little contraption i devised when i wanted to use a drill to tighten several bolts at the bottom of a build at an angle, so the regular drill hex key didn't cut it. The bottom of some regular handheld hex keys have a "rounded" bottom for that purpose, so instead of cutting the tool i designed this workaround so i can just snap it on around the key and drill away.

I designed it for a tight fit around a 3mm key, so for other size of keys just scale it by an according fraction. Jus